Lawn Mower Maintenance: 10 Steps for Peak Performance

Modern mowers start easily—but neglecting maintenance kills engines fast. Follow this annual checklist.

1. Fresh gas: 87+ octane, <30 days old. Use 1–2 gal plastic cans (no rust). Old gas gums carburetors.
2. Clean air filter: Service every 25 hours/season. Paper = replace. Foam = wash, oil, reinstall.
3. Read the manual: Manufacturer knows best. Keeps warranty valid.
4. Change oil: Start of every season. Dirt ruins engines.
5. Drain gas at season's end: Run dry or drain. Prevents varnish buildup.
6. Check air filter again: Tap clean or replace if very dirty.
7. Clean fuel filter: Replace—don't clean (tears easily).
8. Spark plug: Replace annually or clean/gap-check. Pre-gapped plugs simplify.
9. Clean undercarriage: Disconnect plug first. Wire brush + hose. Prevents chute clogs.
10. Sharpen & balance blade: File or grinder. Test balance on nail—sharpen heavy side until level. Unbalanced blades damage engine and cut poorly.

Sharp blade, clean filters, fresh fuel = effortless mowing all season.